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6-7% of kids presenting with upper respiratory symptoms will meet the definition for ABS.
The American Academy of Pediatrics (AAP) reviewed the literature and developed clinical practice guideline regarding the diagnosis and management of ABS in children and adolescents.
The AAP defines ABS as: persistent nasal discharge or daytime cough > 10 days OR a worsening course after initial improvement OR severe symptom onset with fever > 39C and purulent nasal discharge for 3 consecutive days.
No imaging is necessary with a normal neurological exam.
Treatment includes amoxicillin with or without clauvulinic acid (based on local resistance patterns) or observation for 3 days.
Optimal duration of antibiotics has not been well studied in children but durations of 10-28 days have been reported.
If symptoms are worsening or there is no improvement, change the antibiotic.
There is not enough evidence to make a recommendation on decongestants, antihistamines or nasal irrigation.
References
Wald et al. Clinical Practice Guideline for the Diagnosis and Management of Acute Bacterial Sinusitis in Children Aged 1 to 18 Years. Pediatrics. Volume 132, Number 1, July 2013.